US12127190B2ActiveUtilityA1

Systems and methods for non-codebook based multi-TRP PUSCH

85
Assignee: ERICSSON TELEFON AB L MPriority: Apr 2, 2021Filed: Apr 4, 2022Granted: Oct 22, 2024
Est. expiryApr 2, 2041(~14.7 yrs left)· nominal 20-yr term from priority
Inventors:Siva MuruganathanShiwei Gao
H04L 5/0051H04L 1/08H04W 72/232H04B 7/0456H04L 5/0023H04L 5/0094H04L 5/0048H04L 5/0044H04W 72/1268H04L 5/0053
85
PatentIndex Score
1
Cited by
20
References
28
Claims

Abstract

Systems and methods for non-codebook based multi-Transmit and Reception Point (TRP) Physical Uplink Shared Channel (PUSCH) are provided. In some embodiments, a method performed by a wireless device includes: receiving a configuration of a first or second Phase-Tracking Reference Signals (PT-RS) port index per Sounding Reference Signal (SRS) resource in two SRS resource sets for non-codebook based PUSCH; receiving indication of: a first set of SRS Resource Indicators (SRIs) from a first SRS resource set; and/or a second set of SRIs from a second SRS resource set; determining at least one of: a first number of PT-RS ports to be transmitted according to the SRS resources indicated in the first set of SRIs; and a second number of PT-RS ports to be transmitted according to the SRS resources indicated in the second set of SRIs; and transmitting the determined number of PT-RS ports along with a plurality of PUSCH repetitions.

Claims

exact text as granted — not AI-modified
The invention claimed is: 
     
       1. A method performed by a wireless device for non-codebook based Physical Uplink Shared Channel, PUSCH, transmission, the method comprising:
 receiving a configuration of a first or second Uplink, UL, Phase-Tracking Reference Signal, PT-RS, port index per Sounding Reference Signal, SRS, resource among a plurality of SRS resources configured in two SRS resource sets for a non-codebook based PUSCH; 
 receiving an indication of at least one of: a first set of SRS Resource Indicators, SRIs, indicating SRS resources from a first SRS resource set; and a second set of SRIs indicating SRS resources from a second SRS resource set; 
 determining at least one of:
 a first number of UL PT-RS ports to be transmitted according to SRS resources indicated in the first set of SRIs; and 
 a second number of UL PT-RS ports to be transmitted according to SRS resources indicated in the second set of SRIs; and 
 
 transmitting the determined number of UL PT-RS ports along with a plurality of PUSCH repetitions. 
 
     
     
       2. The method of  claim 1  wherein a first subset of PUSCH repetitions among the plurality of PUSCH repetitions are transmitted according to the SRS resources indicated in the first set of SRIs and the first subset of PUSCH repetitions include transmission of the first number of UL PT-RS ports. 
     
     
       3. The method of  claim 1  wherein a second subset of PUSCH repetitions among the plurality of PUSCH repetitions, disjointed from a first subset of PUSCH repetitions, are transmitted according to the SRS resources indicated in the second set of SRIs and the second subset of PUSCH repetitions include transmission of the second number of UL PT-RS ports. 
     
     
       4. The method of  claim 1  wherein the plurality of PUSCH repetitions are transmitted according to the SRS resources indicated in the first set of SRIs, and the plurality of PUSCH repetitions include transmission of the first number of UL PT-RS ports. 
     
     
       5. The method of  claim 1  wherein the plurality of PUSCH repetitions are transmitted according to the SRS resources indicated in the second set of SRIs and the plurality of PUSCH repetitions include transmission of the second number of UL PT-RS ports. 
     
     
       6. The method of  claim 1  wherein the first number of UL PT-RS ports is the same as the second number of uplink PT-RS ports. 
     
     
       7. The method of  claim 1  wherein the first number of UL PT-RS ports is different from the second number of UL PT-RS ports. 
     
     
       8. The method of  claim 1  wherein the first number of UL PT-RS ports is determined to be one when the SRS resources indicated in the first set of SRIs all have a same PT-RS port index configured. 
     
     
       9. The method of  claim 1  wherein the second number of UL PT-RS ports is determined to be one when the SRS resources indicated in the second set of SRIs all have a same PT-RS port index configured. 
     
     
       10. The method of  claim 1  wherein the first set of SRIs and the second set of SRIs are respectively indicated via a first SRI field and a second SRI field in a Downlink Control Indicator, DCI, scheduling the PUSCH repetition. 
     
     
       11. The method of  claim 1  wherein the first set of SRIs and the second set of SRIs are respectively indicated via a first index and a second index configured as part of configured grant PUSCH configuration. 
     
     
       12. The method of  claim 1  wherein the first SRS resource set corresponds to a first Transmit and Reception Point, TRP, and the second SRS resource set corresponds to a second TRP. 
     
     
       13. The method of  claim 1  comprising receiving an indication of both the first set of SRS Resource Indicators, SRIs, indicating SRS resources from a first SRS resource set and the second set of SRIs indicating SRS resources from a second SRS resource set. 
     
     
       14. The method of  claim 1  comprising determining both the first number of UL PT-RS ports to be transmitted according to SRS resources indicated in the first set of SRIs and the second number of UL PT-RS ports to be transmitted according to SRS resources indicated in the second set of SRIs. 
     
     
       15. The method of  claim 1  wherein transmitting determined number of UL PT-RS ports along with the plurality of PUSCH repetitions comprises transmitting the determined UL PT-RS ports along with the plurality of PUSCH repetitions. 
     
     
       16. A method performed by a base station for non-codebook based Physical Uplink Shared Channel, PUSCH, reception, the method comprising:
 transmitting configuration of a first or second Uplink, UL, Phase-Tracking Reference Signals, PT-RS, port index per Sounding Reference Signal, SRS, resource among a plurality of SRS resources configured in two SRS resource sets for non-codebook based PUSCH; 
 transmitting an indication of at least one of: a first set of SRS Resource Indicators, SRIs, indicating SRS resources from a first SRS resource set; and a second set of SRIs indicating SRS resources from a second SRS resource set; 
 determining at least one of:
 a first number of UL PT-RS ports to be received according to SRS resources indicated in the first set of SRIs; and 
 a second number of UL PT-RS ports to be received according to SRS resources indicated in the second set of SRIs; and 
 
 receiving the determined number of UL PT-RS ports along with a plurality of PUSCH repetitions. 
 
     
     
       17. The method of  claim 16  wherein a first subset of PUSCH repetitions among the plurality of PUSCH repetitions are received according to the SRS resources indicated in the first set of SRIs and the first subset of PUSCH repetitions include reception of the first number of UL PT-RS ports. 
     
     
       18. The method of  claim 16  wherein a second subset of PUSCH repetitions among the plurality of PUSCH repetitions, disjointed from a first subset of PUSCH repetitions, are received according to the SRS resources indicated in the second set of SRIs and the second subset of PUSCH repetitions include reception of the second number of UL PT-RS ports. 
     
     
       19. The method of  claim 16  wherein the plurality of PUSCH repetitions are received according to the SRS resources indicated in the first set of SRIs and the plurality of PUSCH repetitions include reception of the first number of UL PT-RS ports. 
     
     
       20. The method of  claim 16  wherein the plurality of PUSCH repetitions are transmitted according to the SRS resources indicated in the second set of SRIs and the plurality of PUSCH repetitions include transmission of the second number of UL PT-RS ports. 
     
     
       21. The method of  claim 16  wherein the first number of UL PT-RS ports is the same as the second number of uplink PT-RS ports. 
     
     
       22. The method of  claim 16  wherein the first number of UL PT-RS ports is the different from the second number of UL PT-RS ports. 
     
     
       23. The method of  claim 16  wherein the first set of SRIs and the second set of SRIs are respectively indicated via a first SRI field and a second SRI field in a Downlink Control Indicator, DCI, scheduling the PUSCH repetition. 
     
     
       24. The method of  claim 16  wherein the first set of SRIs and the second set of SRIs are respectively indicated via a first index and a second index configured as part of configured grant PUSCH configuration. 
     
     
       25. The method of  claim 16  wherein the first SRS resource set corresponds to a first Transmit and Reception Point, TRP, and the second SRS resource set corresponds to a second TRP. 
     
     
       26. The method of  claim 16  wherein receiving the determined number of UL PT-RS ports along with the plurality of PUSCH repetitions comprises receiving the determined UL PT-RS ports along with the plurality of PUSCH repetitions. 
     
     
       27. A wireless device comprising one or more processors configured to cause the wireless device to:
 receive a configuration of a first or second Uplink, UL, Phase-Tracking Reference Signals, PT-RS, port index per Sounding Reference Signal, SRS, resource among a plurality of SRS resources configured in two SRS resource sets for non-codebook based PUSCH; 
 receive an indication of at least one of: a first set of SRS Resource Indicators, SRIs, indicating SRS resources from a first SRS resource set; and a second set of SRIs indicating SRS resources from a second SRS resource set; 
 determine at least one of:
 a first number of UL PT-RS ports to be transmitted according to SRS resources indicated in the first set of SRIs; and 
 a second number of UL PT-RS ports to be transmitted according to SRS resources indicated in the second set of SRIs; and 
 
 transmit the determined number of UL PT-RS ports along with a plurality of PUSCH repetitions. 
 
     
     
       28. A base station comprising one or more processors configured to cause the base station to:
 transmit configuration of a first or second Uplink, UL, Phase-Tracking Reference Signals, PT-RS, port index per Sounding Reference Signal, SRS, resource among a plurality of SRS resources configured in two SRS resource sets for non-codebook based PUSCH; 
 transmit an indication of at least one of: a first set of SRS Resource Indicators, SRIs, indicating SRS resources from a first SRS resource set; and a second set of SRIs indicating SRS resources from a second SRS resource set; 
 determine at least one of:
 a first number of UL PT-RS ports to be received according to SRS resources indicated in the first set of SRIs; and 
 a second number of UL PT-RS ports to be received according to SRS resources indicated in the second set of SRIs; and 
 receive the determined number of UL PT-RS ports along with a plurality of PUSCH repetitions.

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